电力系统及其自动化学报2016，Vol.28Issue(10)：117-122,6.DOI:10.3969/j.issn.1003-8930.2016.10.020
改进dq变换的动态电压恢复器检测新方法
Improved dq Transform Algorithm for Dynamic Voltage Restorer Detection
黄永红 1施慧 1徐俊俊 1张云帅1
作者信息
- 1. 江苏大学电气信息工程学院，镇江 212013
- 折叠
摘要
Abstract
To meet the real-time and accuracy requirements for voltage sag detection in dynamic voltage restorer,an im⁃proved dq transform algorithm based on adaptive least mean square(LMS)filter and software phase-locked loop is pro⁃posed.The adaptive LMS algorithm with time delayed feedback is applied to the digital filter,which is applied to the control process of software phase-locked loop. The filtering process is conducted in advance,where instead of the tradi⁃tional low pass filter,derivative method is used to isolate the DC component under dq coordinate system instantaneous⁃ly. The proposed method can improve the accuracy of voltage sampling value,accomplish phase lock,and improve the accuracy and response speed of voltage sag detection.A simulation model built in PSCAD/EMTDC validates the ef⁃fectiveness of the proposed method .关键词
电压暂降检测/dq变换/自适应最小均方滤波器/软件锁相环/求导法Key words
voltage sag detection/dq transform/adaptive least mean square(L M S)filter/software phase-locked loop/derivative method引用本文复制引用
黄永红,施慧,徐俊俊,张云帅..改进dq变换的动态电压恢复器检测新方法[J].电力系统及其自动化学报,2016,28(10):117-122,6.
